hard of heart

例句：

1. 1. She is known forher hard of heart and unwaveringdetermination.
   她以固执己见和毫不动摇的决心而闻名。
2. 2. The old man washard of heart and refused to listen toreason.
   这位老人固执己见，拒绝听道理。
3. 3. Despite his hard of heart,he always tries to find a solution thatworks for everyone.
   尽管他心肠硬，他总是试图找到一个对每个人都有效的解决方案。